It's also worth noting that, given my community development background, the intent is to help them refi into traditional financing after they've established a payment history.

Stack yourself with advisors of various niches to council from on various deals presented. 

Often established sellers go with seasoned listing brokers.

It's a lot of work upfront but once the team and systems are established it gets easier and as you get better you can expand to another city. 

I'm glad I said I had to talk it over with my financial advisors. :) 

@Bryce Jamison As long as the previous owner keeps up with the maintenance of the home and keeps it in good condition, I tend to favor older homes in established neighborhoods.

You are an unlicensed financial advisor.  

Unless it can be established that they are scamming enormous sums, the police, FBI, attorney’s general, and the like, have bigger fish to fry and won’t lift a finger.

So far my research has only introduced me to brokers focused on personal mortgages based on salary. 4) International tax advisors - Has anyone worked with an international tax advisor that they could recommend?

Eliminate debt, establish a budget, and save.